Laserfiche WebLink
revisions . Flanges shall be in accordance with ANSI Specification <br /> B16 . 1 for Class 125 flanges . Bolts shall comply with ANSI <br /> Specification B18. 2. <br /> B . Flanged pipe shall be faced and drilled to the American Standard <br /> Drilling , unless special drilling is called for or required . Where tap <br /> or stud bolts are required , flanges shall be tapped . Flanges shall <br /> be accurately faced and drilled smooth and true , at right angles to <br /> the pipe axis , and shall be covered with zinc dust and tallow or a <br /> rust preventive compound immediately after facing and drilling . <br /> C . Flanged pipe with screwed-on flanges shall be furnished with long <br /> hubs , and the flanges shall be screwed on the threaded end of the <br /> pipe in the shop , and the face of the flange and end of pipe ` <br /> refaced together. There shall be no leakage through the pipe <br /> threads and the flanges shall be designed to prevent corrosion of <br /> the threads from outside . <br /> D . Flanged joints shall be secured with bolts or stud bolts and nuts. <br /> Bolts , stud bolts , and nuts shall conform to American Standard <br /> heavy dimensions, semi-finished with square or hexagonal heads <br /> and cold punched hexagonal nuts , meeting the requirements of <br /> ASTM Designation A-307. Balt sizes shall be American Standard <br /> for the flanges specified , and bolts and nuts shall have good , true <br /> threads. <br /> E . Gaskets shall be in accordance with AWWA Standard <br /> Specifications C115/A21 . 15-99 , or latest revision . <br /> 4.08 SUBMITTALS <br /> Before starting fabrication of the ductile iron pipe and fittings , the <br /> Contractor shall submit complete detailed working drawings for approval <br /> by the Engineer or IRCDUS. Such drawings shall show the piping layouts <br /> and contain schedules of all pipe , fittings , valves , expansion joints , <br /> hangers and supports , and other appurtenances . Where special fittings <br /> are required , they shall be shown in large detail with all necessary <br /> dimensions . The drawings submitted shall show flanged jointed sections <br /> placed so as to be removable without disturbance to the main pipe <br /> sections . <br /> 4. 09 MARKING <br /> A. Number 10 stranded conductor copper trace wire shall be spiral <br /> wrapped or affixed to the top of the pipe . See Trace Wire Detail <br /> M- 14 for specifications regarding installation . ` <br /> B . Trace wire is required over all pipes . <br /> C . A 2" wide magnetic I . D . location tape is required over all pipes . <br /> Tape is to be installed 12" below proposed finished grade. <br /> 4 - 4 <br />